Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Reexamination Certificate
2004-11-05
2008-09-09
Koslow, C. Melissa (Department: 1793)
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
Reexamination Certificate
active
07422704
ABSTRACT:
A phosphorescent phosphor having excellent afterglow luminance characteristics, even under low illumination intensity of radiation conditions, compared to conventional strontium aluminate phosphorescent phosphors of the same type, and particularly a phosphorescent phosphor having excellent initial afterglow luminance characteristics and excellent afterglow luminance characteristics at 60 and 90 minutes after cessation of the excitation, with following requirements:in-line-formulae description="In-line Formulae" end="lead"?0.015<Eu/(Sr+Ba+Eu+Dy)≦0.05, 0.3≦Dy/Eu≦2,in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.03≦Ba/(Sr+Ba)≦0.2 and 2.1≦Al/(Sr+Ba+Eu+Dy)≦2.9.in-line-formulae description="In-line Formulae" end="tail"?
REFERENCES:
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U.S. Appl. No. 10/578,575, filed May 5, 2006, Hirata, et al.
Hirata Yoneichi
Sakaguchi Tomoya
Takeuchi Nobuyoshi
Koslow C. Melissa
Nemoto & Co. Ltd.
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